Two years ago, I wrote a piece about The Asylum, which specializes in cranking out direct-to-DVD knockoffs of major studio blockbusters with titles like “Snakes on a Train,” ‘Transmorphers” and “Street Racer.” My editor at the time, Stephen Lynch, actually coined the term “mockbuster,” which has come into wide use. Matthew Belloni, THR’s legal columnist, reports that 20th Century Fox’s lawyers are not amused by the Asylum’s latest, “The Day the Earth Stopped” (starring its big in-house star, C. Thomas “Soul Man” Howell) and have fired off a cease and desist letter.